Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0BLY callsign genealogy
Currently held by HARRISON, MICHAEL J
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K0BLY's current licensee, walking backwards.
- TWOMBLY, MICHAEL GCOgranted 2023-04-08cancelled 2025-05-13
Successor callsigns
Callsigns held now by people who previously held K0BLY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0BLY, oldest first.
- HARRISON, MICHAEL J MN2012-01-11 → cancelled 2023-02-07
- TWOMBLY, MICHAEL G CO2025-05-13 active